On 02/10/2014 06:17 PM, Tejun Heo wrote:
Hello,
On Mon, Feb 10, 2014 at 10:32:11AM -0500, Jason J. Herne wrote:
[ 950.778485] XXX: worker->flags=0x1 pool->flags=0x0 cpu=6
pool->cpu=2 rescue_wq= (null)
[ 950.778488] XXX: last_unbind=-7 last_rebind=0
last_rebound_clear=0 nr_exected_after_rebound_clear=0
[ 950.778492] XXX: cpus_allowed=2
[ 950.778495] XXX: cpus_allowed_after_rebinding=2
So, everything looks kosher from workqueue side. Weird. cpus_allowed
is properly set and everything. The worker just isn't running on the
cpu it's supposed to be on. Can you please try the following?
Thanks for the fast responses. Here is the output from the last patch:
[34437.173991] WARNING: at kernel/workqueue.c:2156
[34437.173993] Modules linked in: ipt_MASQUERADE iptable_nat nf_nat_ipv4
nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack
xt_CHECKSUM iptable_mangle bridge stp llc ip6table_filter ip6_tables
ebtable_nat ebtables iscsi_tcp libiscsi_tcp libiscsi
scsi_transport_iscsi qeth_l2 tape_3590 tape tape_class vhost_net tun
vhost macvtap macvlan lcs dasd_eckd_mod dasd_mod qeth ccwgroup zfcp
scsi_transport_fc scsi_tgt qdio dm_multipath [last unloaded: kvm]
[34437.174030] CPU: 2 PID: 12 Comm: kworker/1:0 Not tainted 3.14.0-rc1 #1
[34437.174034] task: 00000000f7c9e4c0 ti: 00000000f7cbc000 task.ti:
00000000f7cbc000
[34437.174046] Krnl PSW : 0404c00180000000 000000000015b406
(process_one_work+0x61a/0x640)
[34437.174051] R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0
PM:0 EA:3
Krnl GPRS: 000000007c325b00 0000000000bc2a52 00000000f7f52780
0000000000000001
[34437.174057] 0000000000000000 0000000000000002
0000000000000001 0000000000bc2a4e
[34437.174061] 0000000000000000 0000000084a13500
0000000084a0f000 0000000084a0f018
[34437.174065] 00000000f7f52780 0000000000735d18
00000000f7cbfdd0 00000000f7cbfd58
[34437.174085] Krnl Code: 000000000015b3fa: 92013000 mvi 0(%r3),1
000000000015b3fe: a7f4ff31 brc 15,15b260
#000000000015b402: a7f40001 brc 15,15b404
>000000000015b406: 92011000 mvi 0(%r1),1
000000000015b40a: a7f4fe84 brc 15,15b112
000000000015b40e: 41102018 la %r1,24(%r2)
000000000015b412: e31020180020 cg %r1,24(%r2)
000000000015b418: a784ff59 brc 8,15b2ca
[34437.174115] Call Trace:
[34437.174118] ([<000000000015b0e0>] process_one_work+0x2f4/0x640)
[34437.174122] [<000000000015ba0e>] worker_thread+0x19a/0x3c0
[34437.174126] [<0000000000164842>] kthread+0x10e/0x128
[34437.174132] [<0000000000728e56>] kernel_thread_starter+0x6/0xc
[34437.174136] [<0000000000728e50>] kernel_thread_starter+0x0/0xc
[34437.174138] Last Breaking-Event-Address:
[34437.174141] [<000000000015b402>] process_one_work+0x616/0x640
[34437.174144] ---[ end trace 52d8ee96597a2415 ]---
[34437.174148] XXX: worker->flags=0x1 pool->flags=0x0 cpu=2
pool->cpu=1(1) rescue_wq= (null)
[34437.174152] XXX: last_unbind=-34 last_rebind=0 last_rebound_clear=0
nr_exected_after_rebound_clear=0
[34437.174156] XXX: cpus_allowed=1
[34437.174158] XXX: cpus_allowed_after_rebinding=1
[34437.174161] BUG: scheduling while atomic: kworker/1:0/12/0x00000002
[34437.174164] Modules linked in: ipt_MASQUERADE iptable_nat nf_nat_ipv4
nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack
xt_CHECKSUM iptable_mangle bridge stp llc ip6table_filter ip6_tables
ebtable_nat ebtables iscsi_tcp libiscsi_tcp libiscsi
scsi_transport_iscsi qeth_l2 tape_3590 tape tape_class vhost_net tun
vhost macvtap macvlan lcs dasd_eckd_mod dasd_mod qeth ccwgroup zfcp
scsi_transport_fc scsi_tgt qdio dm_multipath [last unloaded: kvm]
[34437.174194] CPU: 2 PID: 12 Comm: kworker/1:0 Tainted: G W
3.14.0-rc1 #1
[34437.174197] 00000000f7cbfb80 00000000f7cbfb90 0000000000000002
0000000000000000
00000000f7cbfc20 00000000f7cbfb98 00000000f7cbfb98 0000000000115f6a
0000000000000003 0000000000c4da00 000000000000000a 000000000000000a
00000000f7cbfbe0 00000000f7cbfb80 0000000000000000 0000000000000000
0000000000000000 0000000000115f6a 00000000f7cbfb80 00000000f7cbfbd0
[34437.174273] Call Trace:
[34437.174279] ([<0000000000115e5c>] show_trace+0x100/0x148)
[34437.174282] [<0000000000115f18>] show_stack+0x74/0xf4
[34437.174288] [<0000000000720a9c>] dump_stack+0x88/0xb8
[34437.174291] [<000000000071aa40>] __schedule_bug+0x78/0x90
[34437.174295] [<00000000007237e4>] __schedule+0xb8c/0xbac
[34437.174299] [<000000000015b21e>] process_one_work+0x432/0x640
[34437.174302] [<000000000015ba0e>] worker_thread+0x19a/0x3c0
[34437.174306] [<0000000000164842>] kthread+0x10e/0x128
[34437.174309] [<0000000000728e56>] kernel_thread_starter+0x6/0xc
[34437.174313] [<0000000000728e50>] kernel_thread_starter+0x0/0xc
[34437.174317] XXX: after schedule(), cpu=2
--
-- Jason J. Herne (jjhe...@linux.vnet.ibm.com)
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